NA21 Stainless Steels to BS 3072

NA21 - Specification & Application

  • BS 3072 - Specification for nickel and nickel alloys: sheet and plate
  • BS 3074 - Specification for nickel and nickel alloys: seamless tube
  • BS 3076 - Specification for nickel and nickel alloys: bar

Specification for nickel and nickel alloys: bar

Chemical composition(wt.%) of NA21 grade: to BS 3072

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.10
Si - 0.50
Mn - 0.50
P - 0.015
S - 0.015
Cr 20.00 23.00
Ni 58.00 -
Mo 8.00 10.00
Al - 0.40
Cu - -
Ti - 0.40
Fe - 5.00
Co - 1.00
Nb+Ta 3.15 4.15

NA21 - Detail

Specification for nickel and nickel alloys: bar

Mechanical properties of grade NA21 BS 3072

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
714 (≥) 676 (≥) 43 33 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 413

Physical properties of grade NA21 BS 3072

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
316 (≥) 563 (≥) 32 34 24 Solution and Aging, Annealing, Ausaging, Q+T,etc 143
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
946 711 341

Equivalent Grade

Equivalent Products

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